USCGC Thetis (WPC-115), a steel-hulled, diesel-powered Thetis-class patrol boat of the United States Coast Guard.

[1][4] At the time of the Japanese Attack on Pearl Harbor on 7 December 1941, Thetis was operating out of Key West.

[3] Thetis's antisubmarine warfare (ASW) training missions were conducted along with local patrol and escort duties out of Key West from 1941 to June 1945.

On 7 January 1944 she rescued seven survivors from USS St. Augustine which had accidentally been rammed by merchant tanker Camas Meadows off the coast of Cape May, New Jersey.

[4][5] In June 1945, Thetis was assigned to air-sea rescue service with the Third Coast Guard District.